Gas and air mixer.



Patented Sept. 2, I902.

8. B RUICHGANS. GAS AND AIR MIXER. (Applieation filed IDc. so. 1901 (Nb Model.)

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v A NlTED PATENT FFICEQ STEIIIAN BROIOI-IGANS, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE PERFECT GAS MACHINE COMPANY, OF MILI/VAUKEE, \VISOONSIN, A

CORPORATION OF WISOON SIN.

GAS AND AIR MIXER.

SPECIFICATION forming part of Letters Patent N 0. 708,308, dated September 2, 1902.

Application filed December 30, 1901- Serial No. 87,784. (No model.)

Myinvention has relation to improvements in air and gas mixers of that class in which air is mixed with gas or with vaporfrom gasolene or other volatile substances for light and fuel.

In devices of the above character it is the aim to mix the vapors of gasolene or other volatile substances with air in proper proportion in order to produce a uniform gas of unvarying candle-power. In devices as heretofore constructed a weight-balanced float has been provided arranged within a mixingchamber with an air-valve so attached to or with such float that the motions of the float and attached valve are identical, the movement of the valve being limited to the movement of the float. In this form of devices a lever has been used as a'means of suspending and balancing the float, the said float being attached to one end of the lever and a counterbalancing-weight at the other end, the sole and essential function of said lever being to suspend and balance said float. In such devices the movement of the valve is accomplished solely and directly by the float Without the intervention of the lever and is in no sense dependent upon the operation of the lever.

It is the primary object of my invention to provide a form of construction wherein the opening and closing of the valve for regulating the admission of air is accomplished by a mechanism which includes a lever, said mechanism being separate and distinct from the float, but operated by the float, the movement of the valve being directly dependent upon the movement of the pivoted lever, the suspension and balancing of said float being entirely independent of said lever.

A further object resides in the provision of an improved form of sustaining device to counteract the weight of the material of which the float is constructed, whereby the float becomes more sensitive to the changing conditionof the vapor within the mixingchamber when the air is mixing with the gas, thus accomplishing an accurate mixture of gas and air and avoiding an accumulation of too heavy or too thin a vapor. The means of suspension of the float also permits an adj ustment of the float while the apparatus is in actual operation without permitting the escape of a dangerous quantity of gas, thus allowing for a more accurate adjustment than with present devices.

With the above and other incidental objects in view the invention consists of the devices and parts or their equivalents, as hereinafter set forth.

In the accompanying drawings, Figure 1 is a vertical sectional view of myinvention, and Fig. 2 is a horizontal section on the line 2 2 of Fig. 1.

Referring to the drawings, the numeral 3 indicates an outer casing of any desirable shape and forming an interior mixing-chamoer l. Within the chamber is a float 5 of the ordinary and usual form of construction employed in devices of this character. EX- tending from the float is a rod 6. This rod extends through the end of the casing, preferably into a tube 7, projecting outwardly from said end of the casing. The portion of the rod Within the tube is surrounded by a coiled spring 8, which spring is confined between the end of the casing and nuts 9 9, turned onto the threaded extremity of the rod. The outer end of the tube is provided with a threaded cap 10, which when removed affords opportunity to gain access to the interior of the tube for the purpose of turning the nuts and adjusting the tension of the spring. While the rod 6 could project directly from the end of the float, yet I prefer to extend said rod through the float and beyond the same for a desired distance and freely through an opening in a cross-bar 11, disposed beneath one end of the float. By this arrangement a means is provided for accurately guiding the float and rod in their vertical movement. Leading to the casing,

preferably to the bottom thereof, and communicating with the interior mixing-chamber said float against the gravity of the float.

of said casing is the air-inlet pipe 12, through which the air is supplied at the proper pressure. Also leading from a carburetor or other source of supply (not shown) to the casing and communicating with the interior chamber of said casing is the gas-inlet pipe 13, and leading from the casing is the mixed air and gas eduction pipe 14, which extends to the burners or other medium to be supplied with the gas.

Within the mixing-chamber 4is alever 15, which at one end is pivoted to the wall of the casing and at its opposite or free end has suspended therefrom a chain or other suitable device 16, said chain or device carrying at its lower end a valve 17, which is seated on a valve-seat 18 in the air-inlet pipe 12. A suitable connection should be provided between the rod 6 and an intermediate portion of the lever, so as to cause said lever to be turned on its pivot or fulcrum on the rising and falling of the float. I prefer that this connection should be a pivotal connection, and a convenient arrangement for this purpose is shown in the accompanying drawings, wherein the rod is illustrated as provided with a collar 19, said collar having pivots or pintles 2O 20, projecting from diametrically opposite points thereof and pivotally engaging the side pieces of a yoke-like intermediate portion 21 of the lever.

Referring to the operation of the invention, the tension of the spring 8 is first regulated so that when vapor of the desired richness is passing into the chamber 4 and out of said chamber to the burners the action of said gas upon the float will not be sufficient to raise As the float under these conditions remains at a state of rest, it is of course obvious that the lever 15 is not turned, and hence the valve 17 remains closed. As soon, however, as the vapor-current becomes too rich or too highly charged or saturated the resulting increase of its density will cause the float to rise, and

t this rising of the float causes the lever to be andthereby admit a quantity of air into theturned in a direction to raise the valve 17,

mixing-chamber sufficient to restore the gas toits proper condition of density. When gas is being drawn from the mixing-chamber, the float through the described operation of course varies the position of-the valve 17 in accordance with the amount of air required from time to time to keep the gas in the mixing-chamber in proper condition.

From the foregoing description it will be seen that I provide a simple device or apparatus for the purpose and one at the same time which possesses the ad vantage of having the operation of the valve which controls the admission of air directly and solely dependent upon the actuation of the lever. Attention is also directed to the fact that by utilizing the lever as I do in my invention a'greater control of the valve is obtained than when the valve is connected directly to the fioat that is to say,the construction provides for the opening of the valve more quickly-and hence providing for a quick entrance of the air into the mixing-chamber, and also provides for the closing of the valve quickly to shut off the entrance of the air instantly. By this arrangement a more uniform gas is provided by reason of the better control of the valve, and in this construction also it is not necessary that the float move to a considerable extent in order to admit the proper quantity of air. By the employment also of my improved form of sustaining device to counteract the weight of the material of which the float is constructed the said float becomes more sensitive to the changing condition of the vapor within the mixing-chamber when the air is mixing with the gas, thus accomplishing an accurate mixture of gas and air and avoiding an accumulation of too heavy or too thin a vapor. Also by reason of the fact that the tension of the spring may be regulated an adjustment of the float is made possible while the apparatus is in actual operation without permitting the escape of a dangerous quantity of gas, thus allowing for a more accurate adjustment than with present devices. All that is necessary to be done in order to effect this adjustment when the apparatus is in actual operation is merely to remove the cap 10 and then turn the nuts 9.

What I claim as my invention is 1. The combination ofa mixing-chamber having a gas-inlet port, a mixed air and gas ed uction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamber, a float within the chamber, means for suspending the float, a pivoted lever within the mixing-chamber, a connection between the float and the lever, whereby said lever is turned on its fulcrum when the float is moved, a valve for controlling the air-inlet port,,and a connection between the valve and the lever, whereby the movement of the lever causes the valve to be moved away from or toward its seat.

2. The combination of a mixing-chamber having a gas-inlet port, a mixed air and gas eduction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamber, a float within the chamber, elastic means for suspending the float, a pivoted lever within the chamber, a connection between the lever and the float, whereby said lever is turned on its fulcrum when the float is moved,

a valve for controlling the air-inlet port, and.

a connection between the valve and the lever, whereby the movement of the lever causes the valve to be moved away from or toward its seat.

3. The combination of' a mixing-chamber having a gas-inlet port, a mixed air and gas eduction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamber, a float within the chamber, an adjustable means for suspending the float, a pivoted 1ever within the chamber, a connection between the lever and the float, whereby said lever is turned on its fulcrum when the float is moved, a valve for controlling the air-inlet port, and a connection between the valve and the lever, whereby the movement of the lever causes the valve to be moved away from or toward its seat.

4. The combination of a mixing-chamber having a gas-inlet port, a mixed air and gas eduction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamber, a float within the chamber, means for suspending the float, a rod extending from the float, a pivoted lever within the chamber and adapted to be actuated by the rod,when the float is moved, avalve for controllingthe air-inlet port, and a connection between the valve and the lever whereby the movement of the lever causes the valve to be moved away from or toward its seat.

5. The combination of a mixing-chamber havingagas-inlet port, a mixed air and gas eduction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamber, a float within the chamber, means for suspending said float, a rod extendingfrom the float, a pivoted lever within the chamber and having a pivotal connection with the rod, whereby said lever-is actuated when the float is moved, a valve for controlling the air-in let port, and'a connection between the valve and the lever, whereby the movement of the lever causes the valve to be moved away from or towardits seat.

6. The combination of a mixing-chamber having a gas-inlet port, a mixed air and gas eduction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamber, a float within the chamber, a rod extending from the float, a pivoted lever within the chamber and adapted to be actuated by the rod when the float is moved, a valve for controlling the air-inlet port, a connection between the valve and the lever,whereby the movement of the lever causes the valve to be moved away from or toward its seat, and a coiled spring surrounding the rod and confined between a fixed part and an enlargement on the rod, said spring adapted to yieldingly suspend the float.

7. The combination of a mixing-chamber having a gas-inlet port, a mixed air and gas eduction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamber, a float within the chamber, a rod extending from the float, a coiled spring surrounding the rod andconflned between a fixed part and an enlargement on the rod, said spring adapted to suspend thefloat, a valve for controlling the air-inlet port, and means adapted as the float rises or falls for causing the valve to be moved away from or toward its seat.

8. The combination of a mixing-chamber having a gas-inlet port, a mixed air and gas eduction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamher, a float within the chamber, a rod extending from the float, a coiled spring surrounding the rod and confined between a fixed part and an enlargement on the rod, said spring adaptedto suspend the float, a valve for controlling the air-inlet port, means for regulating the tension of the spring, and means adapted as the float rises or falls for causing the valve to be moved away from or toward its seat.

9. The combination of a mixing-chamber having a gas-inlet port, a mixed air and gas eduction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamber, a tube extending from the end of the mixing-chamber, a float within the chamber, a rod extending from the float and through the end of the mixing-chamber and into the tube, a coiled spring within the tube and surrounding the rod and confined between a fixed part, and an enlargement on the rod, said spring adapted to suspend the float, a valve for controlling the air-inlet port, and means adapted as the float rises or falls for causing the valve to be moved away from or toward its seat.

10. The combination of a mixing-chamber having a gas-inlet port, a mixed air and gas eduction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamber, a float within the chamber, means for suspending the float, a valve for controlling the air-inlet port, means adapted as the float rises or falls for causing the valve to be moved away from or toward its seat, and means for guiding the float in its movement. 7

11. The combination of a mixing-chamber having a gas-inlet port, a mixed air and gas eduction port, and an air-inlet port, the latter adapted to deliver air to said mixing-chamber, afloat within the chamber, means for suspending the float, a valve for controlling the air-inlet port, means adapted as the float rises or falls for causing the valve to be moved away from or toward its seat, a rod extending from the float, and a device which the rod en gages, said device adapted for guiding the float in its movement.

12. The combination of a mixing-chamber having a gas-inlet port, a Inixedair and gas eduction port, and an-air-inlet port, the latter adapted to deliver air to said mixing-chamber, a float within the chamber, means for suspending the float, a valve for controlling the air-inlet port, means adapted as the float rises or falls for causing the valve to be moved away from or toward its seat, a rod extending from the float, and a guide-bar having an opening through which the rod passes, whereby the float is guided in its movement.

ICC

In testimony whereof I affix my signature WVitnesses:

A. L. MORSELL, ANNA V. Fausr. 

